I have 1 1996 Plymouth voyager what type of brake fluid do I use?

Mineral and vegetable oil brake fluids became obsolete many years ago apart from a very few exceptions and these were replaced by a universal glycol based type which is virtually the only type available from the majority of retailers.

Early glycol fluids had a relatively low boiling point and have been replaced by types with higher boiling points so currently there is generally two types available - in Europe these are DOT 4 and Dot 5.
DOT 4 is suitable for all clutch and brake systems (apart from a few exceptions) of low and medium performance vehicles and DOT 5 for the braking systems of high performance vehicles. Most people most of the time find DOT 4 a better all-round fluid and because the information surrounding DOT 5 (and 5.1) tends to be vague and suggests at least some are silicone based which can be harmful to some hydraulic seals.

The main problem with glycol based fluids is many braking hydraulic systems are vented to atmosphere and the fluid is hygroscopic and absorbs atmospheric moisture which lowers the boiling point. This is why a brake fluid change is part of the modern service and maintenance schedule.

Dot3, or dot 4

You can prestone Dot 3 brake fluid for your vehicle. Or any other brand just make sure it’s DOT 3.